linux-kernel - Re: BUG: Bad page map in process udevd (anon

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <AANLkTinB=EgDGNv-v-qD-MvHVAmstfP_CyyLNhhotkZx@mail.gmail.com>
Date:	Thu, 17 Feb 2011 11:11:51 -0800
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>
Cc:	Ingo Molnar <mingo@...e.hu>, Michal Hocko <mhocko@...e.cz>,
	linux-mm@...ck.org, LKML <linux-kernel@...r.kernel.org>
Subject: Re: BUG: Bad page map in process udevd (anon_vma: (null)) in 2.6.38-rc4

On Thu, Feb 17, 2011 at 10:57 AM, Eric W. Biederman
<ebiederm@...ssion.com> wrote:
>
> fedora 14
> ext4 on all filesystems

Your dmesg snippets had ext3 mentioned, though:

  <6>EXT3-fs (sda1): recovery required on readonly filesystem
  <6>EXT3-fs (sda1): write access will be enabled during recovery
  <6>EXT3-fs: barriers not enabled
  ..
  <6>EXT3-fs (sda1): recovery complete
  <6>EXT3-fs (sda1): mounted filesystem with ordered data mode
  <6>dracut: Mounted root filesystem /dev/sda1

not that I see that it should matter, but there's been some bigger
ext3 changes too (like the batched discard).

I don't really think ext3 is the issue, though.

> I was about to say this happens with DEBUG_PAGEALLOC enabled but it
> appears that options keeps eluding my fingers when I have a few minutes
> to play with it.  Perhaps this time will be the charm.

Please do. You seem to be much better at triggering it than anybody
else. And do the DEBUG_LIST and DEBUG_SLUB_ON things too (even if the
DEBUG_LIST thing won't catch list_move())

                      Linus
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/